2 years ago

When light reflects from a surface, there is a change in its

1 answer:

6 0

The answer is: none of the above.

Explanation:

When light reflects from a surface, the frequency, wavelength, and speed do not change. They remain the same.

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Kinetic energy of an object is equal to

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See
K.E=1/2(mass*velocity²)
so option B is the correct answer.
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3 years ago

Amanda has started running as her primary form of exercise, but she's getting bored with it and finds excuses to procrastinate.

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AnswerB

Explanation:

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2 years ago

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If a suspended object A is attracted to a charged object B, can we conclude that A is charged?

spayn [35]

Not necessarily, object A could also be neutral, and becoming a dipole due to object B's charge. A charged object can induce a dipole in a neutral object, and that object would then become attracted without being charged.

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3 years ago

A certain parallel-plate capacitor is filled with a dielectric for which κ = 5.0. The area of each plate is 0.027 m2, and the pl

alexdok [17]

Answer:

Energy will be $4.776\times 10^{-5}J$

Explanation:

We have given that dielectric constant k = 5

Area of the plate $A=0.027m^2$

Distance between the plates $d=2mm=2\times 10^{-3}m$

Electric field E = 200 kN/C

We know that capacitance is given by $C=\frac{K\epsilon _0A}{d}=\frac{5\times 8.85\times 10^{-12}\times 0.027}{2\times 10^{-3}}=0.597\times 10^{-9}F$

We know that electric field is given by $E=\frac{V}{d}$

So $V=Ed=200\times 10^3\times 2\times 10^{-3}=400volt$

So energy will be $E=\frac{1}{2}CV^2=\frac{1}{2}\times 0.597\times 10^{-9}\times 400^2=4.776\times 10^{-5}J$

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3 years ago

22. The main purpose of the turbine in the turbojet engine is to

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3 years ago